The presence of weeds in winter sowing chickpea is a serious threat to crop yield. The conventional hand and mechanical weed controls are not economically effective in chickpea. Therefore, the use of other weed control methods such as chemical control is necessary. The more effective herbicides with broader spectrum of weed control and wide adaptability in chickpea is sought. So, the effect of herbicides including pyridate, pendimethalin, oxyflourfen, trifluralin and paraquat on chickpea weeds were evaluated at the Research Farm of Tehran University, Karaj (Iran) during the growing season of 2002-2003. The experimental design was Randomized Complete Block design (RCBD) with four replications. Weed control treatments included the pre-emergence applications of pendimethalin (1320 gr. a.i./ha), oxyflourfen (600 gr. a.i./ha); post-emergence applications of pyridate (1200 gr. a.i./ha), oxyflourfen (480 gr. a.i./ha) and paraquat (200 gr. a.i./ha) different combination of pre-plant trifluralin (960 gr. a.i./ha) and pendimethalin (1320 gr. a.i./ha) each with post–emergence applications of pyridate (1200 gr. a.i./ha) and oxyflourfen (480 gr. a.i./ha). Handweeding and finally a weed free and weed infested plot were also considered as checks. The results showed that chickpea seed and biological yield, were significantly affected by weed control treatments (p?0.05). The results also showed that pre-emergrnce application of oxyflourfen effectively controlled weeds at early seasen. The combined treatments of pendimethalin + oxyflourfen, pendimethalin + one handweeding, trifluralin + one hand weeding and trifluralin + oxyflourfen effectively controled total broadleaf weeds by 93.4, 92.2, 90 and 88.5 percent, respectively. Post–emergence applications of oxyflourfen and paraquat caused injury to the crop. Thus, the integrated treatments of trifluralin + one hand weeding, pendimethalin + pyridate, trifluralin+ pyridate, pendimethalin + one handweeding and application of pendimethalin alone, with good weed control and high yield, were found to be the best treatments to use in chickpea under similar coditions to those in this experiment
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